Definately talk to them. They will help you to be comfortable and try to find appropriate people for you to dive with. Let them know you are a newbie and they will be alert to look after you. My experience is that the boats love it when you tell them that you are new because it lets them know how they can best help you. It seems to the new guy who doesn't say anything, but they figure it out through observation that worries them the most. The 10-10's are good trips. I bet you will have a very nice day.